MOT Risk Index.co.uk

BMW 3 Series — MOT statistics 2024

The BMW 3 Series failed 24.75% of 675,043 first MOT attempts in 2024 ("first-time", excluding retests). Adjusted for the age of the fleet, its initial-failure ratio is 75.6 (100 = expected for its age profile). This car fails its MOT about 24% less often than expected for its age.

MOT risk index 75.6, 95% CI 75.3–75.9 (100 = national average) 100 75.6 60 160
Index
75.6
100 = age-normal
Raw fail rate
24.75%
n = 675,043
Dangerous /100
16
national ≈13
Diesel − petrol
-2.1 pp
fail-rate gap
Rank
5 of 56
lower index = better

Age-adjusted peer: Mercedes E Class (index 75.8) — the two published results are 0.2 index points apart.

BMW 3 Series common problems: what actually fails the MOT

Visibility stands out at 15.4 per 100 tests, against 12.0 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

BMW 3 Series common problems: what actually fails the MOT — 2024 UK MOT data

family vs national — top component groups, per 100 tests. Legend: This family · National avg.

Component-group comparison table
GroupThis familyNationalFamily / national
Lamps & electrical22.423.50.95×
Suspension19.119.90.96×
Brakes17.014.31.19×
Visibility15.412.01.28×
Tyres13.010.31.27×
Emissions & leaks5.34.91.08×
Named defects — items per 100 initial tests, this family vs UK national average, 2024
What failedper 100 tests (this family)per 100 tests (UK average)ratio family / UKWhat to check
Windscreen or window damaged or seriously…Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view8.474.271.98×Check wipers, washers and windscreen chips in the driver's view
Shock absorber damaged to the extent that it does…A shock absorber damaged to the extent that it does not function or showing signs of severe leakage4.491.163.87×Ask the seller about: A shock absorber damaged to the extent that it does not func
Parking brake efficiency below minimum requirementParking brake efficiency below minimum requirement2.731.541.78×Feel for brake judder and pulling on the test drive
Tyre tread depth not in accordance with the…Tyre tread depth not in accordance with the requirements4.853.821.27×Check tyre tread depth across the full width
Tyre cords visible or damagedA tyre cords visible or damaged2.992.001.50×Check tyre tread depth across the full width
Lamp missing, inoperative or in the case of a…A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning3.182.561.24×Try every light and switch — lamps are a top failure
Tyre seriously damagedA tyre seriously damaged3.853.291.17×Check tyre tread depth across the full width
Aim of a headlamp is not within limits laid down…The aim of a headlamp is not within limits laid down in the requirements3.392.991.13×Try every light and switch — lamps are a top failure
Suspension joint dust cover severely deterioratedA suspension joint dust cover severely deteriorated3.003.450.87×Listen for knocks over bumps — worn suspension joints are common
Suspension pin, bush or joint excessively wornA suspension pin, bush or joint excessively worn5.356.030.89×Listen for knocks over bumps — worn suspension joints are common

Named defects ranked by how much more often they appear than the national average — not by raw rate.

BMW 3 Series MOT advisories: what gets flagged

Brakes are highest at 93.4 per 100 tests; Body & structure are lowest at 8.6 per 100 tests — the gap is 84.8 per 100 tests.

higher bar = flagged more oftenadvisory items per 100 initial tests

BMW 3 Series MOT advisories: what gets flagged — 2024 UK MOT data
Advisory rates table
GroupAdvisories per 100
Brakes93.4
Tyres88.9
Suspension72.5
Emissions & leaks20.9
Non-component advisories15.4
Body & structure8.6

Advisories are wear the tester noted but didn't fail — what will need money soon.

How does the BMW 3 Series perform as it gets older?

At age 16 stands out at 28.9%, against 41.5% for all cars of the same age.

higher = larger sharecompare shares in percentage points

How does the BMW 3 Series perform as it gets older? — 2024 UK MOT data

Chart axes: car age, years · failure-rate scale 0–46%.

Takeaway: a 10-year-old 3 Series has roughly a 20% chance of failing its MOT; from about age 4 it stays above the national age curve.

Data table
AgeBMW 3 SeriesAll carsGap
39.6%10.9%-1.3 pp
411.8%11.6%+0.3 pp
510.8%13.5%-2.7 pp
611.1%15.6%-4.6 pp
712.0%18.2%-6.2 pp
814.0%21.3%-7.2 pp
916.5%24.4%-7.9 pp
1020.0%27.7%-7.7 pp
1123.1%30.6%-7.4 pp
1227.6%33.4%-5.8 pp
1328.6%36.0%-7.4 pp
1429.7%38.6%-8.9 pp
1530.6%39.9%-9.2 pp
1628.9%41.5%-12.5 pp
1730.1%41.5%-11.4 pp
1830.8%42.4%-11.7 pp
1932.3%42.2%-9.9 pp
2030.5%37.5%-7.0 pp

Is a BMW 3 Series ULEZ compliant?

The share of classifiable 2024 BMW 3 Series MOT tests likely ULEZ compliant by first-registration date is 36.3%.

Based on 674,952 classifiable initial MOT tests. This describes the tested fleet, not a specific car. MOT data do not record Euro class, so likely compliance is inferred from fuel and first-registration date. For the only authoritative answer, check the registration with TfL's official ULEZ checker.

higher = larger share likely compliantinferred from fuel and first-registration date; not a recorded Euro class

Age-band estimate from classifiable initial MOT tests
Vehicle age at testLikely ULEZ-compliant shareTests
Under 3 yearsSuppressed — sample below publication threshold
Check a registration with TfL
n = 7
3–5 years100.0%
Check a registration with TfL
n = 32,260
6–7 years100.0%
Check a registration with TfL
n = 24,704
8 years100.0%
Check a registration with TfL
n = 43,131
9 years48.5%
Check a registration with TfL
n = 53,950
10–14 years19.1%
Check a registration with TfL
n = 257,212
15–17 years44.3%
Check a registration with TfL
n = 123,820
18 years45.3%
Check a registration with TfL
n = 32,953
19 years0.0%
Check a registration with TfL
n = 20,122
20+ years0.0%
Check a registration with TfL
n = 86,793

BMW 3 Series petrol vs diesel: which ages best

Petrol is highest at 26.2%; Hybrid is lowest at 14.9% — the gap is 11.3 percentage points.

higher = larger sharecompare shares in percentage points

BMW 3 Series petrol vs diesel: which ages best — 2024 UK MOT data
Fuel split table
FuelTests% failingGap vs best
Diesel432,62724.1%+9.2 pp
Petrol235,60826.2%+11.3 pp
Hybrid6,69914.9%+0.0 pp

Chart sample sizes: n=433k · n=236k · n=6,699.

How dangerous are BMW 3 Series MOT failures?

Dangerous defects stand out at 15.7 per 100 tests, against 12.9 per 100 tests nationally.

higher bar = fails more oftenrate per 100 tests

How dangerous are BMW 3 Series MOT failures? — 2024 UK MOT data
Severity table
SeverityThis family /100National /100Family / national
Minor26.4024.381.08×
Major60.8563.260.96×
Dangerous15.6612.891.21×

Chart values: Minor 26.4 · Major 60.9 · Dangerous 15.7.

Per 100 tests on this family. National average: Minor 24.4 · Major 63.3 · Dangerous 12.9 per 100.

Does the month of a BMW 3 Series MOT matter?

Nov is highest at 25.8%; Mar is lowest at 23.4% — the gap is 2.4 percentage points.

higher = larger sharecompare shares in percentage points

Does the month of a BMW 3 Series MOT matter? — 2024 UK MOT data

Chart scale: 22%–29%.

bars: BMW 3 Series · dashed: all class-4 cars

Month-by-month table
MonthBMW 3 SeriesAll carsGap
Jan25.16%27.37%-2.2 pp
Feb24.65%26.14%-1.5 pp
Mar23.41%24.75%-1.3 pp
Apr25.45%26.01%-0.6 pp
May24.36%25.01%-0.7 pp
Jun24.62%25.01%-0.4 pp
Jul24.48%26.04%-1.6 pp
Aug24.71%25.79%-1.1 pp
Sep24%25.19%-1.2 pp
Oct25.6%27.13%-1.5 pp
Nov25.78%27.2%-1.4 pp
Dec24.66%26.29%-1.6 pp

Takeaway: the spread between best and worst month is 2.4 percentage points — booking month barely matters for this family. Seasonality partly reflects registration-date clustering, not weather.

Before reading the shape: most of it is not about cars. Britain changes its registration plates twice a year, and 19.5% of these cars were first registered in March with another17% in September — 37% in two months against the 17% an even spread would give. An MOT falls due three years after first registration, so the buying calendar becomes the testing calendar. Peaks here mark when cars are tested, not when they are worse.

BMW 3 Series average mileage by age

At age 8, the middle half of 3 Seriess runs from 59,201 miles to 96,505 miles, against 76,185 miles as the median.

further right = more milesmedian is the typical car; band is p25–p75

Bars: BMW 3 Series · dashed: all class-4 cars — 2024 UK MOT data

Chart axes: car age, years · odometer scale 0–174k mi.

Does high mileage mean more BMW 3 Series MOT failures?

Same age band (6–14 years), split by odometer — this separates wear from age: 9.4% of the lowest-mileage cars failed versus 29.7% of the highest.

Does high mileage mean more BMW 3 Series MOT failures? — 2024 UK MOT data
Odometer% failingTestsGap vs lowest-mileage band
<40k miles9.4%16,118+0.0 pp
40-70k miles14.5%73,410+5.1 pp
70-100k miles20.5%113,322+11.1 pp
100-140k miles25.9%113,478+16.5 pp
140k+ miles29.7%62,540+20.3 pp

line: median · band: middle half of the fleet (p25–p75)

Mileage by age (p25 / median / p75)
Agep25Medianp75Tests
318,10026,21533,757823
427,55537,10748,9856,745
534,52245,96959,60524,694
640,52353,28967,99017,478
750,32764,39081,0297,227
859,20176,18596,50543,136
966,54885,018106,56753,950
1075,70696,580120,65353,839
1178,480101,523127,88459,254
1283,574108,541135,99655,678
1390,998117,856145,63646,249
1492,640120,683148,70242,196
1591,188118,225147,54639,217
1695,964123,038151,49139,372
1798,375126,447157,73745,231
18104,211133,519165,78032,957
1997,624129,184163,70320,136
20+89,983116,758145,90386,854

A typical 8-year-old 3 Series has ~76,185 miles on the clock. Much more — ask why; much less — check for gaps in the MOT history.

Where in Britain the BMW 3 Series fails its MOT most

Torquay area is highest at 37.2%; Enfield area is lowest at 17.2% — the gap is 20.1 percentage points.

higher = larger sharecompare shares in percentage points

Where in Britain the BMW 3 Series fails its MOT most — 2024 UK MOT data
Toughest areas% failingvs model overall
Torquay (TQ)37.2%+12.5 pp
Salisbury (SP)34.78%+10.0 pp
Exeter (EX)34.1%+9.4 pp
Bath (BA)33.56%+8.8 pp
Kirkcaldy (KY)32.89%+8.1 pp
Easiest areas% failingvs model overall
Enfield (EN)17.15%-7.6 pp
Dudley (DY)18.46%-6.3 pp
Blackburn (BB)18.48%-6.3 pp
Uxbridge (UB)18.78%-6.0 pp
Durham (DH)18.89%-5.9 pp

Why do areas differ?

For each external factor we correlate the area fail rate with the factor across postcode areas that have ≥800 tests of this family, then compare the bottom vs top fifth (quintile) of the factor. Correlation, not causation — factors travel together (the north is colder and often poorer; urban areas are denser and less salted). Road surface condition is joined now, for the 91 English areas the DfT publishes, and it explains nothing: the correlation with suspension failures is −0.01 and with body and structure failures 0.07. Potholes wreck wheels and tyres between tests, but by the time a car reaches the bay the road it drives on leaves no measurable trace.

In areas with the highest urban share this model fails 5.2 pp less often than in the lowest fifth (r=-0.40, n=113 areas with ≥800 tests).

In the most coastal fifth of areas this model fails 4.8 pp more often than in the most inland fifth (r=-0.38, n=113 areas with ≥800 tests).

In areas with the highest income deprivation this model fails 4.3 pp less often than in the lowest fifth (r=-0.35, n=97 areas with ≥800 tests).

BMW 3 Series Why do areas differ? — 2024 UK MOT data
Values shown in the quintile chart
FactorLow QHigh QGapCorrelation
Urban share26.9%21.7%-5.2 ppr=-0.40
Distance to coast28.0%23.2%-4.8 ppr=-0.38
Income deprivation26.7%22.4%-4.3 ppr=-0.35

Factors that only mean something combined

Some conditions are useless on their own and informative multiplied together. Frost days alone say little — Britain barely freezes. Salt tonnage alone says little — it tracks frost. Distance to the sea alone says little. Multiply the first two and divide by the third and you get an index of how hard an area attacks a car's underside, and it lines up with the corrosion defects we actually record. We built five such combinations and tested each against our own data. Three survived; two did not, and the failures are listed here on purpose — a proxy that was never checked is decoration. One survivor only survived on the second attempt: built from a crude stand-in for street parking it failed outright, and rebuilt from the census — terraced streets carrying more cars than they have driveways — it works, and carries information the salt index does not.

Composite area indicators, each tested against a defect rate we measure
CompositeBuilt fromTested againstrVerdict
Underbody corrosionfrost days × salt load ÷ (distance to coast + 1)share of tests with a corrosion defect+0.42holds (116 areas)
Tyre wearrain days × annual miles ÷ age at first tyre advisoryshare of tests failing on tyres+0.45holds (116 areas)
Overnight corrosionterraced housing × cars per household × frost daysshare with a corrosion defect+0.41holds (102 areas) — and adds signal beyond the first index
Deferred maintenancedeprivation × advisory-to-failure conversion ÷ labour ratecars repeating the same advisory−0.26fails (118 areas)
Powertrain stressengine capacity ÷ kerb weightsuspension, brake and emissions failures−0.16fails (22 models)

The deprivation result is the one worth dwelling on. The intuition that poorer areas defer repairs is strong enough that most people treat it as established. We tested it twice — once on raw failure rates (r = 0.04) and again, more fairly, on whether an advisory turns into a failure — and it did not hold any of the three times we tried it — on raw failure rates, on advisory-to-failure conversion, and again with deprivation measured properly inside each nation rather than England alone. We are closing it. What does predict local failure rates is the density of test centres, which is a statement about testing, not about cars.

All external-factor correlations (machine-readable)
Factorrn areasLow-Q fail %High-Q fail %Gap ppLow-Q factorHigh-Q factor
Urban share (0–1)-0.40011326.921.7-5.20.41
Distance to coast (km)-0.37511328.023.2-4.86.279.5
Income deprivation (score)-0.3519726.722.4-4.30.10.2
MOT centre density (per 10k vehicles)0.30711322.226.4+4.258.5
Road-salt proxy (g/m²-yr)-0.10111325.124.5-0.6221.2670.1
Frost days (days/year)-0.09611326.224.4-1.911.638
Terrain gradient (% grade)0.0656725.025.9+0.90.53.7

Deprivation uses England IMD 2019 income score only (Scotland SIMD is a different scale). Salt proxy is a simplified NWSRG-style dry-salt sum from air Tmin; coastalness is distance from the area centroid to the nearest coastline.

Every dot is a postcode area — size = how many were tested there, colour = share failing. These figures are not age-adjusted: coastal and rural areas often run older fleets and salted roads, so higher raw fail rates do not automatically mean a worse local stock of this model.

Map labels: Scotland · N. England · Wales · London · S. West. Colour scale: 19%–32% failing.

BMW 3 Series survival: which cars are still on the road

By age 19 stands out at 100%, against 100% at the ages 4–6 reference level.

higher = larger sharecompare shares in percentage points

BMW 3 Series survival: which cars are still on the road — 2024 UK MOT data

Chart axes: car age, years · survival vs ages 4–6 · scale 0–105%.

Survival vs fail rate by age
AgeTestsSurvival vs ages 4–6Fail %
38235%9.6%
46,74541.4%11.85%
524,694100%10.75%
617,478100%11.06%
77,22744.3%11.97%
843,136100%14.04%
953,950100%16.46%
1053,839100%20.03%
1159,254100%23.14%
1255,678100%27.61%
1346,249100%28.6%
1442,196100%29.74%
1539,217100%30.62%
1639,372100%28.94%
1745,231100%30.11%
1832,957100%30.76%
1920,136100%32.29%

DfT licensed stock: peak 647,839 (2013 Q4) → latest 448,681 (69.3% of peak).

By age 19, only about 100% as many cars of this family present for MOT as at ages 4–6 (reference n≈16,305); survivors still fail at 32.3% vs 11.8% at age 4. Older cars that still appear are a selected subset — weaker ones have already left. DfT licensed stock is 69% of its 2013 Q4 peak (647,839 → 448,681).

How many miles does a BMW 3 Series last?

100,000+ miles is highest at 53.7%; 200,000+ miles is lowest at 2.9% — the gap is 50.8 percentage points.

higher = larger sharecompare shares in percentage points

OdometerTests ≥ thresholdShare of sample
100,000+ miles361,84553.7%
150,000+ miles116,13117.23%
200,000+ miles19,7082.92%

Of 673,819 tests of this family with a usable odometer in 2024, 53.7% had already reached 100k miles, 17.2% reached 150k, and 2.9% reached 200k — a cross-section of cars still presenting for MOT, not a full birth cohort.

How many years is a BMW 3 Series likely to last?

Bought at age 5 is highest at 13.9 years; Bought at age 15 is lowest at 4.5 years — the gap is 9.4 years.

bigger number = longer remaining lifeyears on the observed survival curve

Age nowTypical mileage (p50)Expected years left
545,96913.9
876,18511.5
1096,5809.5
12108,5417.5
15118,2254.5

estimateEstimate only — not a warranty: a typical 10-year-old example of this family (~96,580 miles median) has about 9.5 expected years of further MOT-present life on the 2024 survival curve. Derived from how many cars of each age still appear for test, not from a longitudinal panel.

BMW 3 Series faults that come together

Body & structure + Emissions & leaks stand out at 14.43×, against if the faults were independent.

above 1.0× = more than expectedbelow 1.0× = less

Group AGroup BTogetherLift
Body, chassis, structureNoise, emissions and leaks1,55714.43×
Body, chassis, structureSeat belts and supplementary restraint systems49912.35×
Noise, emissions and leaksSeat belts and supplementary restraint systems80312.15×
BrakesSeat belts and supplementary restraint systems1,7459.74×
Body, chassis, structureSteering3518.69×
Lamps, reflectors and electrical equipmentSeat belts and supplementary restraint systems1,8648.42×
Body, chassis, structureBrakes2,4348.32×
Seat belts and supplementary restraint systemsSuspension1,6247.8×

Defects in «Body, chassis, structure» and «Noise, emissions and leaks» appear together 14.43× more often than chance (1,557 co-occurrences in the same test; lift≥1.3, n≥300).

Lift = how many times more often both groups appear on the same test than if independent. Thresholds: lift ≥ 1.3, co-occurrences ≥ 300.

Is low mileage better for a BMW 3 Series?

Cars driven under 5,000 miles a year stands out at 13.4%, against 23.0% for cars driven 8,000–12,000 miles a year.

higher = larger sharecompare shares in percentage points

BandFail %Tests
<5k miles/year13.36%31,995
8–12k miles/year22.99%176,115
Gap (low − normal)-9.63 pp
By fuel and age

Diesel

AgeLow-use fail %nNormal fail %nGap pp
58.051,19310.56,944-2.45 pp
62.9567711.554,587-8.6 pp
87.051,46113.2714,390-6.22 pp
99.522,04817.1321,941-7.61 pp
1010.632,04220.6922,483-10.06 pp
1114.492,20924.0622,694-9.58 pp
1217.22,57629.4722,043-12.27 pp
1318.61,47330.0518,047-11.45 pp
1416.451,33132.5515,796-16.09 pp

Petrol

AgeLow-use fail %nNormal fail %nGap pp
59.191,07710.492,556-1.29 pp
67.4789710.121,769-2.65 pp
89.11,33017.872,445-8.78 pp
98.441,39820.71,928-12.25 pp
1010.841,31020.381,590-9.54 pp
1111.52,63524.012,845-12.51 pp
1217.552,29027.692,387-10.14 pp
1319.232,43430.063,034-10.83 pp
1421.432,90331.673,173-10.25 pp

At matched ages 5–14, cars averaging under 5k miles/year fail at 13.4% vs 23.0% for 8–12k miles/year — 9.6 pp lower (n_low=31,995, n_normal=176,115). In this family low annual use is associated with fewer MOT fails, not more — the ‘garage queen’ penalty is not visible in overall fail rates. Diesel alone: 12.6% low-use vs 22.2% normal (-9.7 pp).

BMW 3 Series real MPG against official fuel economy

petrol/electric (2022) real-world fuel use stands out at +326.66%, against 0% for an exact match to the official figure.

higher = larger sharecompare shares in percentage points

On-board meters against the official test, by cohort
YearFuelRealOfficialGapVehicles
2021diesel6.77 l5.57 l+21.53%144,060
2021petrol8.28 l6.82 l+21.48%83,213
2021petrol/electric6.54 l1.66 l+294.12%51,903
2022diesel6.95 l5.64 l+23.11%98,384
2022petrol8.22 l6.94 l+18.4%64,655
2022petrol/electric6.91 l1.62 l+326.66%41,745

Since 2021 every new car in Europe records its own fuel use, and the regulator publishes what those meters say next to the laboratory figure the car was sold on. For this manufacturer the worst gap is 23.11% — diesel cars of 2022 burning 6.95 litres per 100 km against an official 5.64, with CO₂ higher by the same proportion.

This is the manufacturer, not the model. The regulator aggregates by legal manufacturer (BMW AG), so these figures are context for the badge rather than a measurement of this particular car — a point we would rather state plainly than let a reader assume otherwise. The gap itself is not a scandal, it is the known distance between a standardised laboratory cycle and real roads, but it is the distance you actually pay for at the pump. The plug-in hybrid rows are not a data error and deserve a sentence of their own: an official figure of 1.66 litres assumes the car spends most of its life on the battery, and the meters say these ones burned 6.54. Owners are not plugging them in, and a plug-in hybrid that is never charged is simply a heavy petrol car. Source: European Environment Agency (EEA), Real-world CO2 emissions from new cars and vans, reporting year 2024, v3, 2023_Cars_Aggregated.csv, CC BY 4.0 — copyright holder: European Environment Agency (EEA).

Which BMW 3 Series engine is best?

diesel 1.8–2.0 is highest at 108.7; diesel over 2.0 is lowest at 81.8 — the gap is 26.9 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Engine bands against this model's own failure rate at the same ages
FuelCapacityvs own age normRaw fail %Tests
dieselover 2.0 litre81.818.94%98,654
petrolover 2.0 litre89.126.39%109,354
petrol1.5–1.8 litre101.228.74%9,457
petrol1.8–2.0 litre102.225.92%114,196
diesel1.8–2.0 litre108.725.61%333,434

Splitting this model by fuel alone hides the thing that actually differs. Within the same badge, the diesel 1.8–2.0 runs at 108.7 against this model's own age norm while the diesel over 2.0 runs at 81.8 — a spread of 26.9 points between two cars that share a name.

Read this one with more care than the rest of the page. Age is held constant, but who buys which engine is not: the largest capacity in a range is often a performance or executive variant that is garaged, cherished and lightly driven, while the smallest is frequently a fleet or entry car worked hard from new. The gap below is real in the test records; how much of it is the engine and how much is the owner, this data cannot separate. Bands under 5,000 tests are not shown.

Best year for a BMW 3 Series, and the years to avoid

Build year 1999 is highest at 112.4; Build year 2017 is lowest at 81.4 — the gap is 31.0 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

build year vs the same model at the same age · 100 = as expected

BMW 3 Series build year vs the same model at the same age · 100 = as expected — 2024 UK MOT data
BMW 3 Series by build year, tests 2019–2024. Below 100 is better than the model's own age norm.
Every build year with its confidence interval
Build yearvs own age norm95% CIRaw fail %TestsVerdict
2020107.7101.8–113.512.71%10,127worse
201997.795.2–100.212.19%49,200no different
201885.383–87.611.63%44,684better
201781.478.4–84.512.2%22,424better
201682.881.7–83.913.15%174,030better
201586.785.8–87.715.47%213,031better
201496.595.6–97.519.44%212,628better
201398.998.1–99.822.31%234,188better
2012108.9108–109.726.99%232,178worse
2011105104.1–105.827.93%207,862worse
2010104.9104–105.730%195,831worse
2009103.6102.7–104.431.52%177,285worse
200898.797.9–99.531.39%190,791better
200795.694.9–96.331.58%227,096better
200696.395.5–97.132.82%174,644better
2005102.7101.8–103.736.06%119,363worse
2004107.5106.4–108.638.59%92,085worse
2003105.6104.6–106.738.29%96,390worse
2002105.6104.4–106.838.66%75,687worse
2001109.7108.1–111.441.01%42,494worse
2000109.5107.2–111.841.19%21,076worse
1999112.4109.6–115.242.34%14,477worse
1998108103.8–112.140.3%6,407worse

The best build year here is 2017 and the weakest is 1999. Comparing build years sounds simple and is not: within a single year of testing, a car's build year and its age are the same number, so a naive comparison of years is a comparison of ages wearing a disguise. Each year below is measured against the same model at the same age in other cohorts, across six years of testing — 22 of 23 years come out distinguishable from their own model's age norm.

Two limits worth knowing before you act on this. Age, test year and build year are locked together by arithmetic, so the test-year effect is taken from the observed national failure level of each year rather than estimated — it is an adjustment, not a solution. And for cars built before about 2005, a good score says more about which examples survived to be tested than about how that year was built: survivors are self-selected for care.

BMW 3 Series MOT repair costs

The MOT-failure repair budget per test runs from £113.54 to £215.73, against £54.85 for the test itself.

bigger number = costs morepounds per test, MOT-failing faults only

MOT repairs, budget
£114–216
per test, repairs only
The test itself
£54.85
statutory cap, unchanged since 2010
How the figure is built: chance of failing × typical price of that repair
ComponentFails per 100 testsTypical repairIts priceContribution
Suspension19.1 (nat. 19.9)Suspension coil spring (single corner)£180£34.38
Lamps, reflectors and electrical equipment22.4 (nat. 23.52)Battery replacement (standard 12V lead-acid)£140£31.36
Brakes17.0 (nat. 14.34)Front brake pads (parts + labour, typical hatchback)£150£25.50
Tyres13.0 (nat. 10.27)Tyre (single mid-range 16" fitted)£90£11.70
Noise, emissions and leaks5.3 (nat. 4.9)Exhaust rear silencer£200£10.60

Multiply how often each component fails on this model by what that repair usually costs, and you get the amount an owner should expect to budget per test for MOT-failing faults only — roughly £114 to £216, on top of the test fee itself. It is a budgeting figure, not a quote: the spread between a set of pads and a set of discs is most of the range.

Prices are modal quotes from a hand-kept catalogue of published UK garage guides — we do not scrape the booking sites, their terms forbid it, so this list is short and updated by hand with a source and date against each line. Each line prices one typical repair in that group, not a full remedy, and only groups our catalogue actually covers are counted. The contrast worth noticing is the second card: the legal maximum for the test has been £54.85 since 2010, while the repairs it uncovers have followed inflation the whole time.

For scale from a different direction: Warrantywise, which sees used-car warranty claims rather than test failures, puts the average claim at £2,052 across the ten highest-claim models it ranks and £539 for Honda, the lowest-claim make in its index (Warrantywise index 2026, 1.6 million claims, cars aged 3–15). Those sit an order of magnitude above the figures in this table, and the gap is the point: a warranty claim is a gearbox or an engine, which almost never fails an MOT, while the faults that do fail one are corrosion, lamps and tyres, which no warranty pays for. The two numbers answer different questions and neither replaces the other.

BMW 3 Series running costs for a fleet

Vehicles failing at age 10 stand out at 20%, against 11% at age 5 in the same 100-vehicle fleet.

higher = larger sharecompare shares in percentage points

Fails per 100 at age 5
11
vehicles needing work
At age 10
20
same fleet, five years on
Repairs per 100
£11,354
plus £5,485 in test fees
Off the road
1d
median; 35.55% cleared same day
Failure rate and typical odometer by age
AgeFailsMedian odometerTestsGap vs age 5
411.85%37,1076,745+1.1 pp
510.75%45,96924,694+0.0 pp
611.06%53,28917,478+0.3 pp
711.97%64,3907,227+1.2 pp
814.04%76,18543,136+3.3 pp
916.46%85,01853,950+5.7 pp
1020.03%96,58053,839+9.3 pp
1123.14%101,52359,254+12.4 pp
1227.61%108,54155,678+16.9 pp
1328.6%117,85646,249+17.9 pp
1429.74%120,68342,196+19.0 pp
1530.62%118,22539,217+19.9 pp
1628.94%123,03839,372+18.2 pp
1730.11%126,44745,231+19.4 pp
1830.76%133,51932,957+20.0 pp
1932.29%129,18420,136+21.5 pp

The number a fleet manager needs is not the failure rate, it is the year the car starts costing more. Between age 11 and 12 the failure rate of this model jumps by 4.47 percentage points — the steepest single step in its life, and the natural planning point for replacement.

Repair spend uses the same modal prices as the section above, so it inherits the same limits: one typical repair per component group, not a full remedy. Downtime is the gap between the failed test and the passed re-test, which is the window a vehicle is legally off the road.

BMW 3 Series rust problems: where they corrode

Age-standardised corrosion susceptibility stands out at 0.52×, against for the national age-standardised rate.

above 1.0× = rusts more than averagebelow 1.0× = rusts less

How it rusts
0.52×
0.55% of tests record a corrosion defect vs 1.07% typical — age-standardised
Salt Belt exposure
26th
percentile among the models published here, from its tests across 113 postcode areas

This BMW 3 Series fails on corrosion much less often than average once age is held constant, and its owners live in areas that are gentler than most for the models we publish.

Corrosion is the one failure mode that is as much about geography as about the car. We keep the two apart on purpose: a model can look rusty simply because it is popular in Scotland, and a model can look clean simply because it is bought in Surrey. Blending them into a single score would hide which of the two is doing the work.

Exposure is this model's tests weighted by an area corrosion index built from frost days, salt load and distance to the coast — the composite validated at r = 0.42 against corrosion defects we actually record. It is published as a rank, not a raw score, because every mainstream model skews towards low-corrosion areas for the simple reason that most of Britain's cars are in the south. Susceptibility is standardised to the national age profile, so an old fleet does not get labelled a rusty model.

Does a BMW 3 Series advisory become a failure?

Lamps, reflectors and electrical equipment are highest at 23.4%; Identification of the vehicle is lowest at 2.8% — the gap is 20.5 percentage points.

higher = more likelypercentage is the observed transition probability

chance the same component fails at the next MOT, given an advisory now

BMW 3 Series chance the same component fails at the next MOT, given an advisory now — 2024 UK MOT data
BMW 3 Series, advisory → failure conversion by component group, chained tests 2019–2024. Chart labels and rates: Lamps & electrical 23.4% · Suspension 17.2% · Brakes 13.6% · Visibility 13.1% · Tyres 10.7% · Noise, emissions, leaks 7.4% · Body & chassis 6.7% · Seat belts & restraints 5.3%.
Advisory today → failure at the next test, with how long you have
ComponentFails next timeTypical lead timeMiles of warningAdvisories tracked
Lamps, reflectors and electrical equipment23.4%12.1 months4,43519,761
Suspension17.2%12.1 months5,623301,892
Brakes13.6%12.1 months5,402474,044
Visibility13.1%12.1 months6,4101,917
Tyres10.7%12.1 months6,354492,067
Noise, emissions and leaks7.4%12.1 months4,443138,324
Body, chassis, structure6.7%12.1 months4,55447,065
Seat belts and supplementary restraint systems5.3%12.1 months4,4867,381
Steering5.1%12.1 months5,10420,815
Identification of the vehicle2.8%12.1 months6,33252,550

This is the question an advisory note actually raises, and it needs six years of test history to answer. We followed the same vehicles from one MOT to the next across 2019–2024 and measured how often a component that was merely advised came back as a genuine failure at the next test.

Read it as a budgeting horizon, not a prophecy: the most likely component above turns into a failure for about 23 in 100 cars, and the median gap is 12.1 months and roughly 4,435 miles. The rest were repaired, sold, scrapped, or simply held. Rows with fewer than 500 tracked advisories are not shown.

What will fail next on a BMW 3 Series?

Brakes after a failure at age 15-19 are highest at 19.6%; Lamps, reflectors and electrical equipment after a passed at age 3-5 are lowest at 2.2% — the gap is 17.5 percentage points.

higher = more likelypercentage is the observed transition probability

Probability of each component failing at the next test, by age and last result
AgeLast testMost likely next failuresCars tracked
<3passedTyres 5.8% · Visibility 2.9%29,832
<3advisoryTyres 7.3%9,276
3-5passedTyres 5.7% · Visibility 3.2% · Lamps, reflectors and electrical equipment 2.1%166,600
3-5advisoryTyres 7.5% · Visibility 4.5% · Brakes 3.2%68,098
3-5failureTyres 8.5% · Visibility 5.3% · Lamps, reflectors and electrical equipment 4.6%37,874
6-8passedTyres 5.9% · Lamps, reflectors and electrical equipment 4.7% · Visibility 4.2%234,451
6-8advisoryTyres 8.6% · Lamps, reflectors and electrical equipment 6.4% · Visibility 6.1%133,535
6-8failureLamps, reflectors and electrical equipment 9.8% · Tyres 9.5% · Visibility 7.1%98,126
9-11passedSuspension 6.9% · Lamps, reflectors and electrical equipment 6.6% · Tyres 6.3%187,150
9-11advisorySuspension 10.3% · Tyres 9.0% · Lamps, reflectors and electrical equipment 9.0%144,648
9-11failureLamps, reflectors and electrical equipment 12.5% · Suspension 12.2% · Tyres 10.2%133,553
12-14passedSuspension 8.1% · Lamps, reflectors and electrical equipment 7.5% · Brakes 7.2%133,960
12-14advisorySuspension 12.0% · Brakes 11.1% · Lamps, reflectors and electrical equipment 11.0%143,268
12-14failureBrakes 14.7% · Lamps, reflectors and electrical equipment 14.6% · Suspension 14.4%133,244
15-19passedSuspension 10.9% · Brakes 9.5% · Lamps, reflectors and electrical equipment 9.4%94,219
15-19advisorySuspension 15.8% · Lamps, reflectors and electrical equipment 14.3% · Brakes 14.3%123,969
15-19failureBrakes 19.6% · Suspension 19.0% · Lamps, reflectors and electrical equipment 19.0%127,345
20+passedSuspension 8.5% · Lamps, reflectors and electrical equipment 8.3% · Brakes 6.6%34,866
20+advisorySuspension 15.6% · Lamps, reflectors and electrical equipment 14.5% · Brakes 11.8%35,054
20+failureLamps, reflectors and electrical equipment 19.6% · Suspension 18.3% · Brakes 16.2%37,429

The same chains, cut differently: given a car's age and how its last test went, which component most often causes trouble at the following one.

The pattern that repeats across every family: a failure at one test roughly doubles the chance of a failure on the same component at the next one, and an advisory sits about half-way between a clean pass and a failure. Age bands in years; probabilities are per car, not per defect item.

BMW 3 Series ownership: what six years of MOTs show

The ten-day re-test pass rate is highest at 60.3%; The later re-test pass rate is lowest at 4.1% — the gap is 56.2 percentage points.

higher = larger sharecompare shares in percentage points

Fixed same day
35.55%
of failures re-tested
Fails /10k miles
0.397
miles actually driven
Clean streaks
34.54%
3+ tests, nothing noted
Odometer anomaly
1.377%
reading went backwards

Failing is usually a same-week event, not a disaster. Of 528,295 failures followed through to their re-test, 35.55% were repaired and passed the same day and 60.34% within ten days; the median gap is 1 day. 1,286,223 defect items were cleared in the process.

Per mile driven, not per year. Dividing failures by the miles that actually went onto the odometers between consecutive tests gives 0.397 failures per 10,000 miles, on a median of 5,765 miles a year across 506,475 chains. This is the number to compare between models — an annual rate quietly rewards cars that barely leave the drive.

Two populations hide inside one model. 34.54% of these cars strung together three or more tests with nothing recorded at all, while 34.38% carried the same advisory three times or more — the same fault, noted, ignored, noted again. When you buy used you are buying one of those two histories, and the MOT record shows which.

Odometer anomalies: 1.377% of 507,300 chains show a reading lower than the previous test, with a median drop of 34,975 miles. We call this an anomaly and not fraud on purpose — instrument swaps, imports, unit mix-ups and keying errors all land in the same bucket. Obvious typos (drops under 100 miles or over 90% of the reading) are already excluded.

Do BMW 3 Series recalls reduce MOT failures?

R/2022/089 (Seat belts and supplementary restraint systems) beyond the comparison fleet stands out at -0.1 pp, against 0 pp for no movement beyond the fleet.

negative = improved beyond the comparison fleetpositive = worsened

Age-standardised difference-in-differences around each recall, ±18 months
CampaignLaunchedComponentBeforeAfterFleet movedBeyond fleet
R/2022/0892022-03-30Seat belts and supplementary restraint systems1.44%1.1%-0.21 pp-0.14 pp

A fair test needs a control. Failure rates climb as any fleet ages, so a simple before-and-after around a recall date makes every campaign look useless. Below, each campaign's component is age-standardised and compared against how every other model published here moved on that same component over the same months. The last column is what is left after subtracting the fleet-wide drift.

Negative in the last column means the recalled component improved faster than the rest of the fleet. Across all campaigns we could measure, roughly half clear that bar and half do not — recalls help, but the effect is small at fleet level and inconsistent between campaigns. not causal: no VIN-level link between a car and a campaign, and no evidence the remedy was carried out. Cells with fewer than 500 tests either side are not published. One limit decides how far this goes: the MOT inspects brakes, lights, suspension and structure, so a recall for an airbag inflator or a wiring fire risk leaves no trace here at all. Read this as evidence about recalls whose component the test actually examines — never as a verdict on whether recalls work.

BMW 3 Series safety recalls and how to check yours

DVSA recall campaigns stand out at 114, against 2.54 campaigns per 10,000 licensed cars after fleet size is accounted for.

bigger number = more recorded casescompare like-for-like scope, not sample size alone

recall campaigns launched per year

BMW 3 Series recall campaigns launched per year — 2024 UK MOT data
Campaigns launched per year for the BMW 3 Series. Source: DVSA vehicle safety recalls. Chart values: 2011: 0 · 2012: 2 · 2013: 0 · 2014: 1 · 2015: 0 · 2016: 0 · 2017: 0 · 2018: 0 · 2019: 0 · 2020: 0 · 2021: 0 · 2022: 1 · 2023: 0 · 2024: 0 · 2025: 1.
Most recent safety recall campaigns for the BMW 3 Series
ReferenceLaunchedVehiclesConcern
R/2025/40527/10/202521,604For affected vehicles there is a concern involving water ingress and corrosion to the starter motor for where a short circuit cannot be ruled out. It is strongl…
R/2022/08930/03/20222,018The micro gas generator within the front seatbelt�s retractor may have been damaged and may not act according to the specification in the event of an accident.…
R/2014/06828/07/20142,967The screws retaining the variable camshaft timing (VANOS) housing may loosen and under certain circumstances the heads may break off. This can lead to the VANOS…
R/2012/08130/07/2012701Due to a component in the integrated control module not being to specification it is possible power steering assistance may fail. If this happens the EPS warnin…
R/2012/08130/07/2012701Due to a component in the integrated control module not being to specification it is possible power steering assistance may fail. If this happens the EPS warnin…
All 8 campaigns
ReferenceLaunchedBuild datesVehiclesConcern
R/2025/40527/10/202520/02/2018 – 21/06/202121,604For affected vehicles there is a concern involving water ingress and corrosion to the starter motor for where a short circuit cannot be ruled out. It is strongly recommended to park the vehicle outdoors and not in the im…
R/2022/08930/03/202226/01/2022 – 26/01/20222,018The micro gas generator within the front seatbelt�s retractor may have been damaged and may not act according to the specification in the event of an accident.…
R/2014/06828/07/201401/09/2009 – 30/11/20112,967The screws retaining the variable camshaft timing (VANOS) housing may loosen and under certain circumstances the heads may break off. This can lead to the VANOS leaking oil internally and adversely affect the valve timin…
R/2012/08130/07/201201/02/2007 – 31/12/2011701Due to a component in the integrated control module not being to specification it is possible power steering assistance may fail. If this happens the EPS warning lamp will illuminate and a check control message will appe…
R/2012/08130/07/2012701Due to a component in the integrated control module not being to specification it is possible power steering assistance may fail. If this happens the EPS warning lamp will illuminate and a check control message will appe…
R/2009/06530/06/200923/05/2008 – 21/07/20081,756It has been identified that due to faulty crimping of the component parts of the airbag wiring harness and seat belt tensioner the side airbag or seatbelt tensioner may not trigger in the vent of a collision.…
R/2006/20728/11/200604/03/2006 – 14/03/2006287A temporary fault in the greasing system on the brake servo sealing ring could lead to the sealing ring being subject to wear. In unfavourable conditions the seal may be pressed into the brake servo housing as a conseque…
R/1992/01328/02/199201/01/1991 – 28/02/19928,700Chafing may occur where two cables pass through a grommet in the front bulkhead. This could result in a short circuit and fire risk.…

DVSA lists 114 safety recall campaigns for the BMW 3 Series — 2.54 campaigns per 10,000 of these cars licensed in Great Britain, covering roughly 38,734 vehicles in total. A recall is the manufacturer fixing a fault for free, so an open recall on your car costs nothing to clear.

Counter-intuitive, and measured on our own data: across the 25 families published here, more recalls go with a lower MOT Risk Index (r = −0.52). Heavily recalled models are not worse cars in the test bay — an active manufacturer removes the fault before it becomes an MOT failure.

Check whether a specific car has an outstanding recall — free, by registration — at DVSA's recall service. Source: DVSA vehicle safety recalls (check-vehicle-recalls.service.gov.uk), OGL.

BMW 3 Series technical service bulletins: what dealers are told

NHTSA manufacturer communications are 839.

bigger number = more recorded dealer communicationsnot affected vehicles or confirmed faults

These are the issues the manufacturer fixes quietly: service communications sent to dealers without a public recall campaign. They show what the service network has been told even when the issue never became news.

United States · NHTSA manufacturer communications

US technical service bulletins by communication year; leading subjects cover the full file
Communication yearBulletinsLeading subjects across all years
201580
  • Electrical system (304)
  • Equipment (271)
  • Engine and cooling (103)
  • Engine (75)
  • Adaptive and mobility equipment (67)
  • Structure (67)
  • Powertrain (46)
  • Visibility (40)
2016112
201779
201884
2019137
2020129
202183
202257
202337
202421
202515
20265

Caveat worth stating plainly: this is NHTSA data about US-specification cars. British cars sold under the same name often use different gearboxes, engines and equipment, so a bulletin may describe a component that was never fitted here. The file counts dealer communications, not affected vehicles or confirmed failures, and it cannot tell you whether an individual UK car has the issue. A communication can carry more than one subject tag, so topic counts do not have to add up to the total. Source: NHTSA Manufacturer Communications API (US-market vehicles; queried model years 2015-2022). Licence: U.S. Government work / public domain · retrieved 2026-08-03.

BMW 3 Series owner complaints: what goes wrong

Engine (not MOT-tested) is highest at 128; Tyres are lowest at 13 — the gap is 115.

bigger number = more recorded casescompare like-for-like scope, not sample size alone

Owner complaints (US) against actual MOT failures (UK) for the same component groups
ComponentComplaintsShareMOT fail items per 100MOT rankAgreement
Engine (not MOT-tested)12836.3%not in top 6complained about, rarely an MOT failure
Lamps & electrical9627.2%22.4#1complained about and fails often
Restraints339.3%not in top 6complained about, rarely an MOT failure
Transmission (not MOT-tested)329.1%not in top 6complained about, rarely an MOT failure
Brakes287.9%17.0#3complained about and fails often
Tyres133.7%13.0#5complained about, fails occasionally

Two different populations answering two different questions: the MOT records what an inspector can measure once a year, the complaint file records what annoyed or frightened an owner on the road. A component high in one column and absent from the other is the interesting case — driver-assistance and electronics dominate complaints while almost never appearing as an MOT failure item.

What the reports actually say
25V-636 This has been unresolved for 6 months with no sign of a fix. It’s a starter motor, not the space shuttle.
NHTSA complaint, filed 05/07/2026 · ENGINE
I am submitting a claim pertaining to NHTSA Recall Number 25V636000 which pertains to a engine starter issue that can result in fire. This recall was reported first on September 23, 2025 and has been gone without a remedy. Since as of today, it has been 212 days without a solution that I am driving a car that may catch fire. This is too long and I am seeking remediation in the form of a replacement vehicle.
NHTSA complaint, filed 04/21/2026 · ENGINE

US owners have filed 353 complaints about the equivalent BMW 3 Series to the National Highway Traffic Safety Administration, including 27 that mention a crash, 17 a fire and 26 an injury. These are owner reports, not verified findings — but they are the only large public record of what drivers themselves notice, and they cover the years between MOT tests.

Caveat worth stating plainly: US-specification cars, self-selected reporters, no denominator — complaint counts scale with how many cars were sold there and how motivated owners are to file. The mechanical gap matters as much as the statistical one: American cars of the same name often carry different gearboxes, engines and equipment — automatics where Britain buys manuals — so a drivetrain complaint filed in Ohio may describe a part that was never fitted here. Read the ranking inside a model, not between models, and treat drivetrain entries with particular caution. Source: NHTSA ODI consumer complaints (US market, public domain) — US-spec vehicles, indicative only.

BMW 3 Series inspection results in other countries

Finland Katsastus stands out at 32.1%, against 26.3% nationally.

higher = larger sharecompare shares in percentage points

Same model, different national inspection regimes
CountryTestThis model failsNational averagePositionSample
United KingdomMOT (class 4)24.75%26.01%-1.3 pp675,043
NetherlandsAPK49.3%50.9%-1.6 pp75,436
FinlandKatsastus32.1%26.3%+5.8 pp30,097

The countries disagree about this car, and that is worth saying out loud rather than averaging away. A model can sit above its national average in one country and below it in another because the fleets are not the same cars: different model years, different engines, different roads and salt, and inspection rules that weight components differently. Treat each row as evidence from one regime, not as a verdict.

What Finland fails it for — share of recorded faults
Fault areaShare
Axles, wheels and suspension47.3%
Brake systems25.3%
Environmental hazards11%
Chassis and body4.4%
Road test and visibility3.6%

Useful as a cross-check on the UK defect table above: the categories are named differently, but a component that dominates in both regimes is a genuine weak point of the model rather than an artefact of one country's testing style.

The exact faults Netherlands records — APK defect codes, 2024
CodeFaultRecordedType
210Tyre pressure not at the correct value11,968failure
RA2Excessive leak of other fluids8,493advisory
205Tyre with insufficient tread7,616failure
516Dipped headlight incorrectly aimed6,180failure
AC1Tyre down to 1.6–2.5 mm of tread5,795advisory
RA1Airbag or seat-belt warning light showing a fault3,968advisory
AC5Mechanical brake parts showing wear3,088advisory
307Brake hose damaged, reinforcement visible3,023failure

Worth dwelling on how mundane the top of that list is: tyre pressure, tread depth, headlight aim. The Dutch APK records 1.189 defects per inspection against a much higher national failure rate than Britain's, and the reason is not that Dutch cars are worse — it is that the two regimes draw the line between "note it" and "fail it" in different places. Codes are the RDW's own; the English wording here is our translation of the Dutch original.

Britain is not the only country that inspects every car every year, and the BMW 3 Series is on the road in all of them. Each national regime writes its own rules, so the pass rates below are not comparable to each other — what does travel across a border is whether a model sits above or below its own country's average.

Rows with fewer than 500 inspections are not published. Sources: RDW open data — Meldingen Keuringsinstantie + Geconstateerde Gebreken + Gekentekende voertuigen (2024), CC0. Not an RDW endorsement.; Traficom — Periodic inspections of cars by model / by model and fault object 2024, CC BY 4.0.

BMW 3 Series MOT: quick answers

BMW 3 Series MOT Risk Index stands out at 75.6, against 100 for a car with the same age profile.

below 100 is betterabove 100 is worse100 = normal for this model at that age

What is the BMW 3 Series first-time MOT pass rate?
75.25% of first attempts passed in 2024 (675,043 tests). This is the first-time figure: retests after repair are excluded. Basis: first-time, excluding retests.
Why does this number differ from other sites?
Other sites often report a pass rate that includes retests or counts all attempts. Our 24.75% figure is the first-time initial failure rate, using 675,043 primary tests as the denominator (first-time, excluding retests). The age-adjusted MOT initial-failure ratio 75.6 is shown separately because raw rates compare fleet age as well as cars.

Compare the BMW 3 Series with other cars

Toyota Prius is highest at 79.4; Audi Q3 is lowest at 72.8 — the gap is 6.6 points.

below 100 is betterabove 100 is worse100 = normal for this model at that age

Head-to-head

Audi A3 head-to-headMercedes C Class head-to-headAudi A4 head-to-head

Similar risk

Mercedes E Class (index 75.8)Audi Q3 (index 72.8)Toyota Prius (index 79.4)

Same size class

how Audi A3 compareshow Mercedes C Class compareshow Toyota Yaris compares


Data details & how to cite

Scope: class-4 vehicles (cars), initial tests only, outcomes pass / fail / fixed-on-the-spot at the station (PRS counts towards the failure rate — the defect was present at arrival). Index = observed initial failures ÷ failures expected for this fleet's exact age profile, ×100; margin of error is a 95% confidence interval. Covers ALL generations together — a 3-year-old and a 15-year-old are very different cars; a generation split is on the roadmap. Dataset release dataset_release_id=dvsa-2024-v1, frozen baseline; headline claim_id=family-stats:bmw-3-series:dvsa-2024-v1. Full method: methodology.

Cite: MOT Risk Index (2026). BMW 3 Series MOT statistics 2024 (dvsa-2024-v1). https://motriskindex.co.uk/cars/bmw-3-series/ · Published 2026-07-30.